AirTag Adapter for Dog Collars

I didn't like the dangling style of adapters or the slip-on style (my dogs are way too active to trust they'd stay on), and I didn't want to have visible screws. So I came up with this design. The screws go in from the backside and are invisible from the front. 

License Exclusion: This model is excluded from the Commercial License available through the Commercial License tier of the Printables Club. 

Update 6/29/22: Improved models with better positioning of the screws and less wobble.

Update 5/31/22: Added version for 0.5'' and 1'' collars.

Hardware requirements

4 x  4-40 brass heat inserts, 0.135'' long, e.g., https://www.amazon.com/Products-Inc-Fitting-Injection-Molding/dp/B07NC3C32H/

4x   4-40 Pan head Philips machine screws 3/16'' long, e.g., https://www.amazon.com/binifiMux-Phillips-Machine-Assortment-Stainless/dp/B07QYD1ZVR/

Print and Assembly Instructions

I have uploaded 3mf files with suggested settings. I found printing the parts with the flat side down and supports to produce better results than the other way round. 

Use a soldering iron to heat up the brass inserts, then insert them into the top part (e.g. 

I used ABS and post-processed the parts with acetone vapor smoothing: https://all3dp.com/2/abs-acetone-smoothing-3d-print-vapor-smoothing/

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